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经营范围
发明名称
MINE ROOF SUPPORTS
摘要
申请公布号
GB8800442(D0)
申请公布日期
1988.02.10
申请号
GB19880000442
申请日期
1988.01.09
申请人
GULLICK DOBSON LTD
发明人
分类号
E21D23/04
主分类号
E21D23/04
代理机构
代理人
主权项
地址
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